[HttpGet]
public ActionResult ForumList(int? page)
{
    var forums = MapperBag.ForumMapper.Map(_serviceBag.ForumService.GetAll());
    foreach (var item in forums)
    {
        var topics = MapperBag.TopicMapper.Map(_serviceBag.TopicService.GetAllTopicsByForum(item.Id));
        item.TopicCount = topics.Count();
        int count = 0;
        foreach (var t in topics)
        {
            var posts = MapperBag.PostMapper.Map(_serviceBag.PostService.GetPostsOfTopic(t.Id));
            count += posts.Count();
        }
        item.PostCount = count;
    }
    var model = forums.ToPagedList(page ?? 1, 10);
    return View(model);
}